Operator spacing union types / multi-catch expressions

[jrfnl]

I believe some clarification is needed about the spacing requirements around the | operator when used in the following two situations:

• Union types
• Multi-catch statements

At this moment, most coding standards I'm aware of use "no spaces around the | operator" as a rule for union types.

However, multi-catch statements predate union types and the example in section 5.6 had spaces around the | operator. PHPCS has taken the literal interpretation based on the example and expects one space on either side of the | operator in multi-catch statements. CS-Fixer treats the | in multi-catch as if it were a union type, expecting no spaces.

End-users are confused ;-/

Ref: https://github.com/squizlabs/PHP_CodeSniffer/issues/3663